---
product_id: 16642154
title: "Rockford Fosgate TM400X4ad Power Marine 400 Watt Class-ad 4-Channel Amplifier"
brand: "rockford fosgate"
price: "€ 873.65"
currency: EUR
in_stock: true
reviews_count: 13
category: "Rockford Fosgate"
url: https://www.desertcart.fi/products/16642154-rockford-fosgate-tm400x4ad-power-marine-400-watt-class-ad-4
store_origin: FI
region: Finland
---

# 400W max power output Compact 1.6” x 4.3” x 8.3” size Element Ready: dust, UV & corrosion proof Rockford Fosgate TM400X4ad Power Marine 400 Watt Class-ad 4-Channel Amplifier

**Brand:** rockford fosgate
**Price:** € 873.65
**Availability:** ✅ In Stock

## Summary

> ⚡ Unleash Marine-Grade Power in a Compact Package!

## Quick Answers

- **What is this?** Rockford Fosgate TM400X4ad Power Marine 400 Watt Class-ad 4-Channel Amplifier by rockford fosgate
- **How much does it cost?** € 873.65 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/16642154-rockford-fosgate-tm400x4ad-power-marine-400-watt-class-ad-4)

## Best For

- rockford fosgate enthusiasts

## Why This Product

- Trusted rockford fosgate brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** Small footprint packs more power per square inch than any other Rockford Fosgate amp, fitting seamlessly into tight spaces.
- • **Smart Sound Control:** On-board Punch EQ with +18dB boost at 45Hz and Butterworth crossover ensures deep bass and pristine audio clarity.
- • **Powerhouse Performance:** Delivers up to 400 Watts across 4 channels for crystal-clear, room-filling sound even in the toughest marine environments.
- • **Built to Brave the Elements:** Element Ready design protects against dust, UV rays, and corrosion—perfect for motorsport and marine adventures.
- • **Effortless Setup & Reliability:** High-level auto turn-on, CLEAN clip detection, and backed by a 2-year warranty for worry-free, professional-grade performance.

## Overview

The Rockford Fosgate TM400X4ad is a compact, 400 Watt Class-AD 4-channel amplifier engineered for marine and motorsport use. Featuring proprietary Constant Power technology, it delivers up to 25% more power across all impedance loads. Its Element Ready design ensures durability against dust, UV, and corrosion, while advanced audio controls provide superior sound quality. With a sleek footprint and a 2-year warranty, it’s the ultimate amplifier for professionals demanding powerful, reliable performance on the water or off-road.

## Description

Buy Rockford Fosgate TM400X4ad Power Marine 400 Watt Class-ad 4-Channel Amplifier: Marine Amplifiers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: GREAT AMP! VERY SATISFIED! - Installed in my RZR, using Amp to run 2 6.5" Kickers up front and 2 8" Kickers in the rear. This amp does an amazing job! Very clean sound and such a small package. Definitely worth it!
Review: Great sound, maybe too much for the price. - This Rockford Fosgate amp is actually more than I was looking for. I upgraded my 18 Limited with a new head unit, this amp and 4 new RF 6.5 speakers. The amp alone would have blown the factory speakers. I don't have to turn it up over half way to be able to hear it at 80mph on the freeway. It's easy to set up with the videos on the Rockford site. Also get the right plug and play wiring harness so there are no splicing of factory wires.

## Features

- Our compact (1.6” x 4.3” x 8.3”) Power Marine TM400X4ad 4-channel amplifier produces more power per square inch than any other model we make with 400 Watts of POWER
- Proprietary Constant Power amps are the most powerful on the market, delivering up to 25% more power across all impedance loads (100 Watts x 4 @ 4-Ohm or 100 Watts x 4 @ 2-Ohm or 200 Watts x 2 @ 4-Ohm Bridged)
- Built on Rockford Fosgate’s proprietary Class-AD technology and Element Ready protecting against dust, UV, and corrosion, making it perfect for motorsport and marine applications
- High-level auto turn-on, CLEAN circuit input/output clip detection, On-board Punch EQ with +18dB boost @ 45Hz and 12dB/octave Butterworth crossover make TM400X4ad an impressive POWER house
- Famous Rockford Fosgate build quality ensures that the TM400X4ad will handle everything you throw at it! Full 2-year parts and labor warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00YWCRKEQ |
| Best Sellers Rank | #44,506 in Electronics ( See Top 100 in Electronics ) #19 in Marine Amplifiers |
| Brand | Rockford Fosgate |
| Customer Reviews | 4.6 4.6 out of 5 stars (307) |
| Date First Available | March 10, 2015 |
| Exterior | Painted |
| Global Trade Identification Number | 00780687345150 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.2 pounds |
| Item dimensions L x W x H | 13.4 x 6.5 x 11.3 inches |
| Item model number | TM400X4ad |
| Manufacturer | Rockford Fosgate |
| Manufacturer Part Number | TM400X4AD |
| Maximum Supply Voltage | 12 Volts |
| Model | Rockford Fosgate TM400X4AD |
| Mounting Type | Boat Mount |
| Number of Channels | 4 |
| Output Power | 400 Watts |
| Product Dimensions | 13.4 x 6.5 x 11.3 inches |
| Specification Met | Cea-2006 Compliant |
| UPC | 780687345150 |
| Voltage | 12 Volts |
| Wattage | 400 watts |

## Product Details

- **Item dimensions L x W x H:** 13.4 x 6.5 x 11.3 inches
- **Manufacturer:** Rockford Fosgate
- **Maximum Supply Voltage:** 12 Volts
- **Mounting Type:** Boat Mount
- **Voltage:** 12 Volts

## Images

![Rockford Fosgate TM400X4ad Power Marine 400 Watt Class-ad 4-Channel Amplifier - Image 1](https://m.media-amazon.com/images/I/71zC2lWOlIL.jpg)

## Questions & Answers

**Q: Will this fit my 07 ultra classic with aftermarket radio**
A: Yes it can

**Q: what do i need to install this amp in my 2019 ultra limited**
A: Sadly, I did not install it - I had a mechanic do it.  However, it is basically a plug and play unit that plugs into the existing radio amp.

**Q: Does this come with the tuning cd?**
A: Being an Authorized Rockford dealer we can say, yes. The setup disc is included, link below. Thank you.
https://www.amazon.com/Rockford-Fosgate-TM400X4AD-Amplifier-Channel/dp/B00YWCRKEQ/ref=sr_1_1?keywords=Rockford+Fosgate+TM400X4ad&m=AQH2A184LSYJ8&qid=1582836819&s=merchant-items&sr=1-1

**Q: How can I purchase the speaker wire and power wire that goes connected to this amplifier?**
A: I ordered a set on ebay...Search - Rockford Fosgate Speaker Output Wire Harness

## Customer Reviews

### ⭐⭐⭐⭐⭐ GREAT AMP! VERY SATISFIED!
*by C***T on March 6, 2025*

Installed in my RZR, using Amp to run 2 6.5" Kickers up front and 2 8" Kickers in the rear. This amp does an amazing job! Very clean sound and such a small package. Definitely worth it!

### ⭐⭐⭐⭐⭐ Great sound, maybe too much for the price.
*by M***. on April 19, 2025*

This Rockford Fosgate amp is actually more than I was looking for. I upgraded my 18 Limited with a new head unit, this amp and 4 new RF 6.5 speakers. The amp alone would have blown the factory speakers. I don't have to turn it up over half way to be able to hear it at 80mph on the freeway. It's easy to set up with the videos on the Rockford site. Also get the right plug and play wiring harness so there are no splicing of factory wires.

### ⭐⭐⭐⭐⭐ Worth the money !
*by D***. on September 8, 2023*

Installed this on my 2019 Electra Glide Standard FLHT, using Sony MEX-M100BT head unit, with Infinity Kappa Perfect 600x and 900X speakers. This amp is LOUD and clear, with ample bass ! Was running an Soundstream Picasso Nano PN4.1000D for 3 years, but kept blowing tweeters because the wires would come loose from the amp due due vibration, it still works, and is a great amp, just not built for motorsport applications. The wires on the TM400Xad are soldered to pigtails then plug into the amp, preventing this problem. Also, the input and output clip setup makes it pretty much impossible to blow speakers, would highly recommend this amp to anyone looking to upgrade their motorcycle audio system.

## Frequently Bought Together

- Rockford Fosgate TM400X4ad Power Marine 400 Watt Class-ad 4-Channel Amplifier
- Rockford Fosgate RFK-HD14 Amplifier Wiring Kit for 2014 Harley Davidson Road Glide & Street Glide
- Rockford Fosgate TMS65 Power Harley-Davidson 6.5" Full Range Fairing/Tour-Pak Speakers (2014+)

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.fi/products/16642154-rockford-fosgate-tm400x4ad-power-marine-400-watt-class-ad-4](https://www.desertcart.fi/products/16642154-rockford-fosgate-tm400x4ad-power-marine-400-watt-class-ad-4)

---

*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-16*